It is an experimental thing and MORE IS NOT BETTER - less is better until you find the happy medium based the fuel you buy or have in the tank already. WARNING! Never had it act up while running, but since E10 fuel came along it is borderline getting started after hot shutdowns. do you have a picture of it hooked up? The point being here - you need enough steady high enough pressure on the ball to allow it to regulate down reliably too. This will keep your pressure steady and have instant pressure change when adjusting. 3/8 Inch NPT Ports 1 Inch 2 Out. 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In the early days of the oil business the demand was for kerosene or coal oil. Is it a product that would be sold by a panel beater's supply shop? Full content visible, double tap to read brief content. This diaphragm repair kit is for 12-803 and 12-804 regulators. Adjustable Fuel Regulation From 1 To 4 PSI.220 Inch 7/32 Inch Restriction. Refineries have been doing this for decades. Reviewed in the United States on June 20, 2021. This product is intended only for the thinning of industrial maintenance coatings. Putting kerosene into gasoline - while both are hydrocarbons - and they will blend - the lighter oil nature of the kerosene to the solvent of gasoline; in an amount of 5% is not enough to change the STP vapor point of the gasoline, but it will weaken the octane rating of the gasoline enough to feel it under acceleration AND under pressure will raise the vapor point enough to perhaps prevent vapor lock depending on the ambient and under hood temperatures of where one is located. Gauge looks small..it is not. Holley 12-807 Fuel Pressure Regulator Diaphragm Repair Kit made by Holley, for as low as $9.21. Today's cars are all fuel injection so it doesn't matter how easily the gas evaporates, it is under pressure in a closed system from the tank to the intake. If you have it plumbed up "dead headed", lowering the pressure might not react very quickly. Purchased the regulator from Baxter, unit arrived in 4 days.. A vapor lock condition would be caused. Is there a brand name? The following vehicles are considered Emissions Controlled Vehicles: *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Hi Bob, I can get a hold of some 99.7% pure ethyl acetate cheap. All Holley regulators are pre-set at the factory at 2.8 PSI so there is no guesswork when first installing the regulator. I ordered the 12-804 regulator online because I couldn't find one locally, this is for an engine on a piece of equipment that I make my living with. Prewar cars have very low compression and will run better on gas that has some kerosene added. Sign up for a new account in our community. I still think they sent you the high pressure one. . 03-28-2012, 03:04 AM. Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising. 9 really is max. One needs to have studied Chemistry as I have to actually know how this works. Adding heavier weight hydrocarbons WILL raise the vapor point under pressure - usually enough to keep the fuel from vaporizing in the line or boiling off in the carburetor bowl while flowing. Also I fitted a modern soft seat to the carburettor to assist in shutting off the higher pressure from the pump - the original shut off is a brass tapered needle on a brass seat. I tried to bring the 0-140 pressure feed regulator down to 30 by adjusting the two - to up the return flow and lower the feed pressure - but the 15 psi reg I had just worked on started to climb past 9. HWYoF~Ta77[Z4"bG K=yK The higher the RVP, the greater the tendency to vaporize or vapor lock. neglect, accident, improper installation or adjustment, dirt or other contaminants, water, corrosion or faulty repair, or used in applications other than . From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holleys commitment to its customers and their cars is at the core of everything we do. The chemistry class experiment you are referring to will yield the approximate boiling (vapor) point at STP - Standard Temperature and Pressure ONLY. Street/Strip Carbureted Applications A: This Holley universal low pressure fuel regulator is factory-set to 2.7 PSI, but is fully adjustable from 1 to 4 PSI. Some cars are much more apparent to vapor locking than others, I"ve never experienced here in NJ with either of my older Packards which see all kind of hot summer driving conditions. Holley low pressure reg woes #12-804. Add to cart. 3/8 pipe thread ports; 7/32 restriction; . Holley 12-804 1-4 Psi Carbureted Two Port Fuel Pressure Regulator: Item #: HLY12-804 : Quantity: Price: $53.99 Add to cart . . As you can see from what it replaces - it is "hot" solvent - but not quite as hot as acetone in its ability to dissolve other things. All petroleum distillates have different chemical properties which change depending on what you mix them with. Most certainly also, should that be successful, I will then experiment with IMCT as well. Did not like having to reset to zerobut I did. Quick & Hassle Free. What one is after is new "liquid" fuel which vaporizes easily in open air, lights easily and has a rapid flame spread but NOT a hot explosive one, and burns easily and completely under one atmosphere of pressure - what we call 14.7 to 1 - BUT - and this is most important; does not auto-ignite at a low temperature and WAITS to be lit by the spark after being compressed in the cylinder. order Keep in mind that when there is pressure in the line, backing off on the adjustment isn't going to make the pressure go down. There is supposed to a marking on the spring with the correct color, red or gold if it is the low pressure spring. I got all of my supplies in the Home Depot fittings section. This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. Might have been along the same lines as adding a quart of atf to the engine oil to help quiet noisy hydraulic valve lifters, or for "sludge clean-up" activities? We work hard to protect your security and privacy. Adding some additives can raise the AVERGE boiling point but cannot remove the lower-boiling components, so regardless of what higher ends are present, the initial boiling point will remain that of the most volatile components. If I wait a hour for the system to cool to ambient temperature then it starts easy. A small amount of IMCT in gasoline - depending on whether it is the winter or summer blend - depending on what that is as a fuel where you are - raises the boiling point like kerosene or diesel - but also raises or maintains the octane level slightly as ethyl acetate tends to loosen the hydrogen bonds and lets mixture burn more completely without causing pre-ignition we call "detonation" - which is really simply a slight lowering of the "autoignition temperature". You can do a Google search for it, though. Amazon has encountered an error. Free Shipping - Holley Fuel Pressure Regulators with qualifying orders of $99. Does it come with the hose fittings or to be bought separately? [endif]-->. Two 3/8" nipples/hose connections and a 3/8" to 1/8" reducer. . finish) . Installation was made more complicated by the absence of a port for a pressure gauge, which means Eligible for Return, Refund or Replacement within 30 days of receipt. [endif]-->. I turned into a side street and opened the hood. OD says the Boiling point of gasoline cannot be raised by adding a heavier hydrocarbon - such as kerosene or diesel - and points to a high school chemistry class experiment as his proof. Discussion in 'The Hokey Ass Message Board' started by oldrelics, Oct 12, 2010. Each Holley fuel pressure regulator is fully adjustable so regulating the fuel pressure to your engines needs is a simple task. What if any additives would do this and why? So with that vapor fueling system - you are stuck "downgrading it" to a lower quality fuel. Carb Part, 14 PSI Fuel Pressure Regulator Set 3/8in NPT Port 12804 for Holley : Amazon.com.au: Automotive store By 1913 it was the other way around. Otherwise it's good. Much of the excess engine heat will end up soaking the fuel system under the hood. I would like to try IMCT, how is it sold? I have used up to 20% kerosene with no discernible change and have spoken to people who told me that years ago on farms these old cars would run fine if started on gasoline then switched to 100% kerosene. MFG. But it is not the ethyl acetate alone that causes the effect to raise the vapor temperature point of fuel. You could arrange them on a scale from naptha gas, gasoline, kerosene, stove oil, diesel fuel, light lubricating oil, heavy lubricating oil, grease, asphalt. I switched on the electric pump and it instantly picked up and ran for a few seconds then reverted to the classic vapor lock symptoms. The Holley 12-840 fuel pressure regulator features 3/8" NPT in/out ports. ;b DK%*DO[%A IPd?Q~]=n1)E1D*q`D fF-"4N3i4\1uOn(@%c0IHQg`~uKVf{/r0d2}XVXi1-tpE1K[T*3"IS0v27UfTajff`"(dJD0fFlvryT{?:VUusSqD?R$LlalK&@$8q'qbSEv The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. I installed this on my Onan 7000 generator as part of a project to resolve vapor lock issues in hot weather and high altitudes. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. I'm still looking for the reg in this pic. It's not the vendor's fault, these things should have been recalled, or the vendors made aware of the issue so that they could be inspected before they're sold. The Holley 12-804 fuel pressure regulator features 3/8" NPT in/out ports. I put it . Please try again later. None of them worked. This experience ties with that the owner of a very early Twin Six Packard. Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO", Standard conditions for temperature and pressure - Wikipedia, the free encyclopedia, https://www.holley.com/data/Products/Technical/199R7914-3rev3.pdf. Holley Bracket Secondary Adjusting Lever Kit Steel Gold Iridited Holley 4150. Holley 12-804 Fuel Pressure Regulator Installation Instructions . . if you were packing them in boxes they would look identical. So if you're looking for a FPR to get 1-4 psi, then the 12-804 is no longer your best choice. . The two will be very close to the same just as would Water and Anti-Freeze boiled in an open pot. But the heavier elements will raise the boiling point of the mixture. I like the attached simple explanation of the issue. There was a problem adding this item to Cart. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. This is another vexing problem with Ethanol mix, which is about all you can get here in CT. It is not intended to be sold or used for any other purpose. Free shipping for many products! In answer to Rusty's comment about adding anti freeze to water, the difference is that water is only one material, H2O, with a single boiling point (varied only by pressure). As you can see in the photo it's gold, (the same colour as what's in the model 12-803) I called Holley directly and customer service is acting like they're unaware of the issue, even though I've read threads online going as far back as 2018 mentioning this. Among other places on the web - you will find a fairly good dissertation of the issue at => Evergreen Performance Systems, Inc. and Hydrogen Power Central | The true source for powering engines with Hydrogen - not "HHO". Please choose a different delivery location. None of these contain lead and so should not damage a catalytic converter if you have one, HOWEVER too much IMCT will prolong the burn and may result in unburnt - STILL burning HOT gas being exhausted in the exhaust cycle. Q: This product is universal and applies to all vehicles. I mix Industrial Maintenance Coating Thinner (IMCT) around 1 oz per gallon - which is basically a blend of petroleum distillate in the paint thinner / mineral spirits (once called also "white gas") family and ethyl acetate and not only does it cure vapor lock it increases octane because you can feel it in the power and acceleration. Will changing the orientation change the preset pressure setting (checkball falling instead of raising)? It looks like WhatsApp is not installed on your phone. I did, works great & looks beautiful. 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